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Thomas Sansonetti

Senior Counsel

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A longtime litigator and project team leader, Tom helps clients permit and develop projects with potential obstacles in mind.

Long before a lawsuit can threaten a project, he counsels clients on how to develop effective plans of action that will meet government environmental permitting requirements and stand up to judicial scrutiny when those clients' projects are challenged in court.

Tom joined Holland & Hart in 1993 and built a nationally recognized practice in natural resources and environmental law. Considered an expert in natural resources and environmental matters, Tom served as an Assistant Attorney General for the Environment and Natural Resources Division in the Department of Justice and as the Solicitor and Associate Solicitor for Energy and Resources at the Department of the Interior. He has argued before the U.S. Supreme Court and in seven Federal Circuit Courts of Appeal, and served as a federal prosecutor in environmental crimes cases. Tom’s appellate experience highlights his ability to argue cases at all levels of the federal court system.

Active in politics, Tom was Chairman of the Republican Party in Wyoming from 1983-1987. He also served as Wyoming's Republican National Committeeman (1996-2001) and as General Counsel for the Republican National Committee (2001). Tom served as the Chief of Staff and Legislative Director for Wyoming Congressman Craig Thomas during the 101st Congress.

Environmental Litigation Wildlife and Protected Species Water Resources Environmental Federal Lands Permitting Environmental Transactions
Energy and Resources Oil and Gas Mining Oil and Gas Litigation Oil and Gas Regulatory
Washington & Lee University
J.D., 1976
University of Virginia, Colgate Darden School
M.B.A., 1973
University of Virginia
B.A., 1971
  • Foreign Affairs, With Distinction
Colorado
District of Columbia
Wyoming
U.S. Supreme Court
U.S. Circuit Courts of Appeals for the D.C., Federal, First, Second, Eighth, Ninth, and Tenth Circuits
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